Hydroxyapatite
Medical term · H
A hard substance that is a major component of bones and teeth.
Related terms
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HydrogenationThe addition of hydrogen to a compound. Hydrogenation is used to solidify liquid vegetable oils. The process creates trans fats, which are harmful to the heart and blood vessels.
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Hygiene hypothesisThe theory that modern cleanliness means children are not exposed to as many germs at an early age, which results in a more allergies.
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Hydrogen breath testA test used to diagnose gastrointestinal problems; it measures the amount of hydrogen in the breath, which rise when food isn’t being absorbed properly.